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Frigidaire Diswasher ER UO Error code [FIXED]

Model Number: FDB4315LFC2Brand: FrigidaireAge: 1-5 years

Last night I went to start the dishwasher and it came up with a ER UO error code and it wouldn't start or run at all. I looked in the manual and they didn't list this error code. Any idea or what this means, or how to fix it?

The ER UO error code means "Vent Open". On the top back right corner of the dishwasher tub, there is a vent and fan that opens to help dry the dishes at the end of the cycle. If the computer senses that the vent is open, then it won't start the cycle. Frigidaire says to first check the wiring and connections. If the wiring and connections are good, then you should first replace the vent assembly. If that doesn't solve your problem, then you should replace the main control board.

UO Error: Vent open. While in wash cycle ,main control does not receive signal from vent assembly that vent plunger is closed. Plunger
status is sensed with optical sensor in vent assembly. Check wiring between vent assembly and main control board. If wiring correct,replace vent assembly. If error still exist, replace main control board.

I took the dishwasher apart and I couldn't find any bad or loose electrical connections. I inspected the vent, and I couldn't see any visual signs that it was bad. I took the risk and ordered the part with your recommendation. I put the new part in over the weekend, and it is working great now. Thanks for the help! You saved me a lot of money!

I have this exact same problem and the part looks identical. Is that vent unit shown universal with the Frigidaire Model #: FGHD2433KF1 and if not what is the part number for my model? Thanks in advance for your help.

I have this exact same problem and the part looks identical. Is that vent unit shown universal with the Frigidaire Model #: FGHD2433KF1 and if not what is the part number for my model? Thanks in advance for your help.

Did a little more searching and answered my own question.

It is not a universal part, but your model also uses part number 154773301.

Frigidare dishwasher model # PLD4555RFC2

I have the vent off of my dishwasher Model # PLD4555RFC2. Is there a way to verify if it is indeed bad, as it is only 4 years old? The machine was coding UO and there are no obvious wiring problems. Also where can I order the part and what is the part number?

I have the vent off of my dishwasher Model # PLD4555RFC2. Is there a way to verify if it is indeed bad, as it is only 4 years old? The machine was coding UO and there are no obvious wiring problems. Also where can I order the part and what is the part number?

No the manufacture does not have a way to verify the vent is bad. The part number for your model is 154773301. Let me know what you find.

Hi Doc, I have the same "uo" code on a Frigidare dishwasher md#FGHDZ2433KWO. Ser#TH93277839. What is the part number for the vent assembly? Also the dish washer makes a lot of squeaking noises thru out the run cycle, is that normal?

Vo/Er code Frigidaire model FDBB4365FB0

Same flashing "vo/Er" code on mine.
I ran the little diagnostic test (holding down "Air Dry"and "Start"for 3 seconds), and got "VO"right away, then it went through 02 and 03 and 04 stages with no errors, then gave me "HS" code (hall sensor for wash motor?) during the 05 stage. Goes through 06 stage of test, then gives me "RA" (Rinse aid) error in stage 07.

Sorry, Md# FGHD2433KWO. The squeaking sound like the motor or pump, its very noticeable. Not sure if its normal on this dishwasher? Thanks, Jim

The squeaking sound could be coming from the circulation pump motor. Sometimes when the circulation pump starts to go bad, it can start to get noisy and squeak like that. Sometimes when this starts to happen, the pump can also start to leak water, so it is a good idea to replace it right away.

Same flashing "vo/Er" code on mine. Lots of standing water in the bottom.

That water that I can see in your picture is normal. There is always water that will sit in the bottom of the pump sump housing like that. If you are getting the UO ER error code, you will most likely need to replace the vent & fan assembly.

Okay, I haven't quite figured out how to post on this site, so sorry If this shows up in a wrong place. I have a Frigidaire Dishwasher model PLD4375RFC1 that shows error uo. I cannot find the model number for the vent assembly. Help!

Okay, I haven't quite figured out how to post on this site, so sorry If this shows up in a wrong place. I have a Frigidaire Dishwasher model PLD4375RFC1 that shows error uo. I cannot find the model number for the vent assembly. Help!